Lubricating pump



Dec. 11, 1956 1-. R. THOMAS LUBRICATING PUMP 4 Sheets-Sheet 1 Filed May 5, 1951 INVENTOR I T/wmsR 17mm ATTORNEYS? Dec. 11, 1956 T. R. THOMAS LUBRICATING PUMP 4 Sheets-Sheet 2 Filed May 5 1951 WQ mg Q g um N INVENTOR O TlwmaslQ- 772017205 A'ITORN Dec. 11, 1956 T. R. THOMAS 2, 7 2

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LUBRICATING PUMP Filed May 5, 1951 4 Sheets-Sheet 4 INVENTOR Thomas R. Tkomas dww A'ITORNEY 4k United States Patent ce 2,773,562 LUBRICATING PUMP Thomas R. Thomas, New York, N. Y., assignor to Auto Research Corporation, a corporation of Delaware Application May 5, 1951, Serial No. 224,809

Claims. (Cl. 184-27) The present invention relates to a centralized lubricating installation and it particularly relates to a centralized lubricating pump installation of light weight and compact construction adapted to be fitted upon and used in connection with portable tools and machines.

Although not limited thereto, the present invention will be particularly described in its application to a central lubricating pump for a portable textile sewing machine of the type utilized for cutting cloth in layers to be used in making garments, it is to be understood that it has a much broader and wider application to machinery in general.

Among the objects of the present invention is to provide a compact, light weight, readily installed, inconspicuous lubricating pump for portable machinery which may be readily mounted upon such machinery and associated therewith without substantially increasing the weight or bulk thereof and which will give assurance that the moving parts of such machinery will be adequately supplied with properly yet relatively minute quantities of lubricant during operation thereof.

Another object is to provide a novel, lubricating pump for textile sewing machinery which will not interfere with the operation, assembly, repair or maintenance of such textile sewing machinery, and which at the same time will give full and adequate assurance of full and complete lubrication thereof.

' In the drawings wherein like reference characters denote corresponding parts throughout the several views:

Fig. 1 is a vertical view, partly in section, showing the central lubricating pump mounted on a sewing machine.

Fig. 2 is a transverse vertical sectional view of the pump construction.

Fig. 3 is a vertical transverse sectional view upon the line 33 of Fig. 2.

Fig. 4 is a horizontal transverse sectional view upon the line 44 of Fig. 2.

Fig. 5 is a fragmentary transverse sectional view upon the line 5-5 of Fig. 2.

Fig. 6 is a transverse vertical sectional View upon the line 66 of Fig. 2.

Fig. 7 is a side elevational view similar to Fig. 2, upon a reduced scale, showing an alternative construction with a double cam instead of the single cam of Fig. 2 and with a slightly longer drive shaft.

Fig. 8 is a side sectional view of an alternative construction which may be utilized to prevent any breakage or jamming in case of reverse rotation of the external drive shaft, upon the line 88 of Fig. 9.

Fig. 9 is a side elevational View taken from the line 99 of Fig. 8.

Fig. 10 is a front elevational view similar to Fig. 9 of the same device as applied to a double-lobe cam.

Fig. 11 is a vertical sectional view upon the line 11-11 of Fig. 12, showing the latch plate.

Fig. 12 is a front elevational view taken from the line 1212 of Fig. 11.

which may be of the lock-stitch type, having a table A, a rear vertical support'B, and an arm'C. i

The arm C is hollow, as indicated at 10, and it carries 7 The lower pulley 27 in the lower part of the belt 25 is enclosed in a guard casing 28. e

As shown best in Fig. 1, this belt extends obliquely and downwardly away from the neck or tubular member C.

As shown in Fig. l, the arm or tubular member-C is provided with openings at 29 and 30 at the top of the casing 28 to permit free passage of the belt 25. g p

The table A has a depending base 45. A

The pump structure is best shown in Figs. 2, 3 and 4.

The pump structure D has a base 75 and a cover 76. The base has a bottom 77, the end walls 78 and 79 and the side walls 80.

The corners are provided with enlargements 81 having the mounting bolt holes 82.

The wall 78 has an enlargement 83in which is press-fitted the window assembly E. The window assembly has a channel member 84 depressed to 'form the backing cup 86 with the flow openings 87 at the top and 88 at the bottom. This cupreceives the transparent disc 85, which serves as a window.

The gasket 89 assures an oil-tight seal between the backing cup 86 and the transparent window 85. The

press-fit of the channel 84 within the opening 90 assures 99 having the closing annulus 100. The bearing sleeve 98 receives the shaft 101, having the groove 102 with the extension 103. The extension 103 has the flat 104. The flat 104 on the extension 103 enables ready connection to an automatic drive.

The shaft 101 has a lubricating groove 105 within the sleeve 98 and it extends to the right, as indicated at 106, and carries the screw-thread 107 forming a worm which drives the gear 108.

The end of the shaft 101 has an enlarged portion or cap 109 which has the thrust bearing in the end 110 of the screw plug 111. The screw plug is threaded into a tapped opening 112 in the wall 96 of the cover 76.

The fillister head 113 fits in the recess '114.'

The worm 107 drives a gear train, as best shown in Fig. 9. The first unit of the gear train has a large gear 108 and the small pinion 115 which rides upon the shaft'116. The pinion 115 drives the next unit consisting of the gear 117 and the pinion 118 on the shaft 119.

The unit 117118 through the pinion 118 drives the tmit consisting of the gear 120 and the pinion 121 on the shaft 116.

The unit 120-121 in turn drives the gear 122 and the pinion 123 upon the shaft 119.

The unit 122-123 drives the unit consisting of the gear 124 and the pinion 125 on the shaft 116. g

The unit 124-125 drives the unit consisting of the gear wheel 126 and the pinion 127 on the shaft 119.

The pinion 127 drives the gear wheel 128 which in turn drives the cam 129.

- Referring to Fig. 1, there is shown a sewing machine The cam 129 has the lobe 130 and the step 131 which.

cooperate with the follower projection 132 on the lever 133. The lever 133 is mounted upon the hub member 134 turning on the shaft 135. Y 1

The shafts'116 and 119 have spacer sleeves .151

Patented Dec. 11, I 1 956 3 and 152 in respect to the depending hangers 153 and 154 depending from the cover 76.

At the ends of the shafts .116 and 119 are positioned the-.collars 155, and 156=to .keep said shaftsin position..-

The shaft 135 hasasupport 157 in the structure 158 attached :to the end {wall 96. The-otherend of ,the shaft 135 is press-fitted into the recess 159-in the plug 160, Which-is screwed into-the tapped opening 161.

The lever 133 has the rounded end portions '175 which fit in the groove 176-on extension 177 of the piston 17 8.

The piston 178,rides in thecylinder 179. The cylinder-179 has 'a lower tapped opening 180 which is closed by the threaded insert 181 carrying an inlet check valve.

The lower portion of the cylinder 182 has a ,metal cup 183 which receives the filter-1 84. The filter 184.

has the .two backingmetal Screens 185.

The pumpmay also be actuated by the hand actuator G.

The hand actuator G consists of a manual pull-up button 195 with the upper piston extension 196. The shaft 196 is encircled by the coil spring 197 which reacts upon the shoulder 198 and also on .the thimble 199.

The thimble is supported against the base 200 of the cap 201. The cap 201 is interiorly tapped at,202, to be screwed upon the threaded nipple 203.

The pump cylinder 179, in Figs. 2, 3,4 and 6, discharges -throughthe outlet check valve 204, which feeds lubricant under pressure through a tube 205 and a coupling connection 606 (see Figs. 2 and 3). Lubricant passes through the vertical bore 608 to the tapped outlet connection 609 (see Fig. 3). Then the lubricant will flow out .through the .outlet 206, as shown in Fig. 1, to the external pipe 207.

The cover 76 inF-ig. 1,,has a screw filler cap 210, whereas in Figs. 2 and 3 .it has the Gits type pivoted snapfillercap 412. i

In the operation of the pump .the drive may .bedirectly from,the machine at 103 and this drive is through the worm 107, the gear train -H to the .cam 129.

The cam 129 will partly ,lift the lever 133.and the pis-.

ton 178. The piston 178 will be returned by the spring.

197 when the follower 132 passes over thelobe130 and down the step 131. .To give an intermittent manual Operation, the hand button 195 may be employed and this will draw up the piston ,178 against the .spring 197 whenever it is desired .to ,give an .additional shot oflubricant.

The Gits type filler cup 410 (see Figs. 2..and 5.) fitsin the recess 411 in the top wall 92 of the cover 76. The-cup 410 has a cover 412;having a hinge-413 which is pressedinto closedposition by the coil spring 1414. The lubricant that is, poured into. the reservoir D.. wi1l pass through the conical passage 415 and the opening 416.

Referring to Fig. 6,. the,-lubricating groove :105, on the shaft :101 inside the bearingsleevefiS connects'theipassageway 217. This passageway 217 hasagasket connection 218 to the passageway ,219'=which opens into .the recess 176 of the-piston 1,78. rod-leakage of piston 178 thus ,provideslubrication for bearing sleeve,;98. The gasket 218 in Fig. 6.willtake up .the clearance betweenthe cover 76 and the pump body 179.

Asshown upon Fig. .1, .the lubricant fed from the pump D under pressure will firstpass down through the tube 207 intothe junction, 208.

'The junction 208 is heldby the screws (not shown) upon,the table structure A.

'From the junction the lubricant will flow outwardly throughth'e meteringfittings"(not shown) to bearings of themachine.

This relatively small lubricating pump will feed all of the important bearings of the sewing machine structure. The feed will be increased with the speed 'of the drive'shaft 11, which drives'the shaft 101 of the pump through the pulley 27.

Referring-to -the device of "Figs. S and 9, the cam- 510 will be mounted to turn upon the bearing sleeve 511. The bearing sleeve 511 has an enlargement 512 fitting in the shoulder 513. The sleeve 511 bears against the latch plate 514. The gear plate 128 is peened at 515 to the end of the sleeve 511.

The pin 516 is mounted and slides closely in the bore 517 in the cam 510. The bore v:17 is enlarged, as indicated at 518, to receive the coil spring 519.

The pin 516 has a shoulder 520with an end projection 521.

The end projection-521 bears upon the tongue 522, which is pressed out ofthe metal of the plate 514, as best shown in Figs. 19 and 20.

By referring to Figs. 11 and 12, it will be noted that the head or follower 521 of the pin 516 can move freely in the direction 523 toward the base of the tongue 522 when it is driven in reverse movement by the shaft 104 of the pump of Fig. 4 vand the shaft104 of the pump of Fig. ,7, or by the .drive belt'25 of the pump of Fig. .6.

Thus, there will be no danger .of the cam 129 jam" ming against the follower .element 132 of the lever 133,

with resultant breakage.

On the other hand, when there is a direct .drivein the direction 525 toward the end of the tongue 522, the head 521 will-catch in the recess 524 and will drive the -.cam 129.

In Fig. 10 is shown-a double .cam 129 with the twov step members 131 s The latching tongue 522 will be placed in back of one-lobe,=of thecam 129. and will function in the same manner ashas-.already-been.describedtin connection with Figs-8,9, Hand 12.

The sewing machine may be of the Willcox & Gibbs, type, butit is :to Ive-understood that other types of sew-; ingr machines may besimilarly lubricated. Normally, with the Willcox & Gibbs type of sewing machine a res-- high speed bearings and .wilhsupply a correct oil film to:

each individual bearing automatically. The operatorgneed not have any of her attention distracted :by .thelubrication of her machine and the operator may give .allof her; attention to itheisewing operation with the-assurance thta lubrication :will. automaticallyzresult.

Normally, for every 60,000 revolutions ofxthemaim shaft a lubricant shot of .about :twelve drops :offiltered oil will be fed to the bearings.

While there has been herein described a preferred form of the invention, it should be understood that the same may be altered in detailsand in relative arrangement of parts within the scope of the appended claims- 1 Having now particularly. described and :ascertained the nature of the invention, and in what-manner the same'is to be performed, what is claimedis:

1. A central reciprocating plunger lubricant pump :for a centralized branched lubricatinginstallation having .an upright cup-shapedlubricant reservoir casing'devoid of mechanism, aninverted cup-shaped cover for said casing, a drive shaft for said pump mounted -in the sides of :said cover cup and extending horizontally through and below the top ofsaid cover and a cylinder extending through 5 units alternately carried on said superimposed shafts and the ends of said shafts being carried by the sides of said cup.

2. The pump of claim 1, in which the sides of the cup which carry said shafts telescope into the upright lubricant casing.

3. The pump of claim 1, the upper end of said cylinder being threaded and said threaded end portion projecting through an opening in the top of said cup cover and a cap nut clamping said cylinder in position.

4. The pump of claim 1, the last gear in said gear train being provided with a cam tongue member and said cam having a spring pressed plunger riding against said depressed tongue so that said gear will drive said cam in one direction but not in a reverse direction.

5. The pump of claim 1, in which the last gear has a hub upon which the cam is positioned and in which said last gear and cam have a lost motion connection consisting of a depressed tongue stamped out of the periphery of the gear and a spring pressed follower stud carried by said cam.

References Cited in the file of this patent UNITED STATES PATENTS Zerk May 30, Bowman Oct. 10, Hegwein Nov. 7, Waterman Nov. 21, Bijur Nov. 6, Carr Nov. 15, Weis Jan. 31, -Hunting June 17, Bennett July 8, Zeier Feb. 16, Clayton Mar. 28,

FOREIGN PATENTS Great Britain Apr. 28, 

